John lemman



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Hmmm] APR J8 1871 JOHN LEMMAN, OF CINCINNATI, OHIO.

Letters Patent No. 113,898, dated April 18, 1871.

IMPROVEMENT IN MACHINES FOR MOLDING CHAIRfBACKS.

The Schedule referred to in these Lettera Patent and making pax-t of the same.

To all whom it may concern:

Be it known that I, Jonn LEMMAN, of Cincinnati, Hamilton county, State of Ohio, have invented a certain new and useful Improvement in Machines for Molding ChairBacks; andI hereby declare the following to be a sufficiently full, clear, and exact description thereof to enable one skilled in the art to which my invention appertains to make and use it, reference being had to the accompanying drawing@r making part o1' this specification.

Nature and Objects of Invention.

My invention relates to an improvement upon the machine patented by me August 17, 1869, and cousists of a certain peculiar arrangement of the parts, by which the cutter-spindle runs in stationary bea-rings, and the work and form7 are adapted to swivel, swing, and slide in the operation of cutting the chairbaclr or other work to the prescribed shape, the object of this improvement upon the machine patented as aforesaid being to avoid the use of a swiveling drivingpuiley, which is necessarily employed in my former machine, and is under many circumstances objectionable.

Description of the Accompanying Drawing.

Figure 1 is n. perspective view of a machine ernbodying my invention.

Figure 2 is a side eleva-tion of the same partly in section.

General Description.

A is thc frame of the machine, in the bearings B B' of which the cutter-spindle G is journaled.

D the cutter, shaped in suoli a manner as to cuable it to ont in either direction of rotation, and E is the driving-pulley of the same;

The frame also supports upon the bracket F an adjustable guiding-finger, G, on which the form rests and slides. l

A universal joint, consisting of socket H, pivoted at h 71 to swivel in a vertical plane, and jaw I,

pivoted at t' to swivel in a horizontal plane, is connected to the frame A in the manner shown.

Through the socket H the shank k of the arm K is tted to slide and rotate.

The outer end of the arm is constructed with a broad surface, k', to receive the chair-back or other work to be shaped, the latter being iirmiy secured in place by the jaw L and tightening-screw M.

The arm is also iitted with the form or template N for giving direction to the work over the cutter.

This form N is adjustable in the arm by means of nuts P and slotted holes for the bolts, or any other adjusting device.

The arm is operated by the handles R in suoli a way that the work is passed over the cutter in such a direction as to ont with` the grain of the wood half-way across the work; then, by reversing the cutter by suitable beiting, the arm may be moved to cut the other half of the`work with the grain of the wood.

In the operation'of the machine the Harige n of the form N rests upon the pintle or guide-finger G, and is pressed laterally against the Enger by means of the coiled spring S between the socket H and a collar, T, upon the sha-ult k. The elasticity of this spring en! ables the uger to follow the irregular' form N.

In order to fix the workin the arui previous to cntting, the arm may be turned in the socket H bottom side up, so that the work can be conveniently laid upon it and firmly secured.

I claim- 'lhe combination of the stationary guiding-linger G, cutter-spindle C DE revolving in stationary bearings, and the swireling and sliding arm K It carrying the forni and worlr, substantially as zuul for the purpose set forth.

In testimony of which invention I hereunto set my hand.

JOHN LEMMAN.

Witnesses:

FRANK MILLWARD, J. L. WARTMANN. 

